linux-kernel - Re: [PATCH v5 3/3] KVM: selftests: aarch64: Add invalid filter test in pmu_event_filter

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Message-ID: <a60e1025-f093-4285-9d27-dab48bb64bcd@redhat.com>
Date: Tue, 19 Mar 2024 22:06:50 +0100
From: Eric Auger <eauger@...hat.com>
To: Shaoqin Huang <shahuang@...hat.com>, Oliver Upton
 <oliver.upton@...ux.dev>, Marc Zyngier <maz@...nel.org>,
 kvmarm@...ts.linux.dev
Cc: James Morse <james.morse@....com>,
 Suzuki K Poulose <suzuki.poulose@....com>, Zenghui Yu
 <yuzenghui@...wei.com>, Paolo Bonzini <pbonzini@...hat.com>,
 Shuah Khan <shuah@...nel.org>, linux-arm-kernel@...ts.infradead.org,
 kvm@...r.kernel.org, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/3] KVM: selftests: aarch64: Add invalid filter test
 in pmu_event_filter_test



On 2/29/24 07:56, Shaoqin Huang wrote:
> Add the invalid filter test which sets the filter beyond the event
> space and sets the invalid action to double check if the
> KVM_ARM_VCPU_PMU_V3_FILTER will return the expected error.
> 
> Signed-off-by: Shaoqin Huang <shahuang@...hat.com>
> ---
>  .../kvm/aarch64/pmu_event_filter_test.c       | 38 +++++++++++++++++++
>  1 file changed, 38 insertions(+)
> 
> diff --git a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
> index 2dd8ea418f47..86714345ee97 100644
> --- a/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
> @@ -8,6 +8,7 @@
>   * This test checks if the guest only see the limited pmu event that userspace
>   * sets, if the guest can use those events which user allow, and if the guest
>   * can't use those events which user deny.
> + * It also checks that setting invalid filter ranges return the expected error.
>   * This test runs only when KVM_CAP_ARM_PMU_V3, KVM_ARM_VCPU_PMU_V3_FILTER
>   * is supported on the host.
>   */
> @@ -262,6 +263,41 @@ static void run_tests(void)
>  		run_test(t);
>  }
>  
> +static void test_invalid_filter(void)
> +{
> +	struct kvm_pmu_event_filter invalid;
> +	int ret;
> +
> +	pr_info("Test: test_invalid_filter\n");
> +
> +	memset(&vpmu_vm, 0, sizeof(vpmu_vm));
> +
> +	vpmu_vm.vm = vm_create(1);
> +	vpmu_vm.vcpu = vm_vcpu_add_with_vpmu(vpmu_vm.vm, 0, guest_code);
> +	vpmu_vm.gic_fd = vgic_v3_setup(vpmu_vm.vm, 1, 64,
> +					GICD_BASE_GPA, GICR_BASE_GPA);
> +	__TEST_REQUIRE(vpmu_vm.gic_fd >= 0,
> +		       "Failed to create vgic-v3, skipping");
> +
> +	/* The max event number is (1 << 16), set a range largeer than it. */the event space is 16b on ARMv8.1 and 10b on ARMv8.0, set a range larger
than 16
s/largeer/larger
> +	invalid = __DEFINE_FILTER(BIT(15), BIT(15) + 1, 0);
> +	ret = __kvm_device_attr_set(vpmu_vm.vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL,
> +				    KVM_ARM_VCPU_PMU_V3_FILTER, &invalid);
> +	TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter range "
> +		    "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)",
> +		    ret, errno);
> +
> +	/* Set the Invalid action. */
s/the/an
> +	invalid = __DEFINE_FILTER(0, 1, 3);
> +	ret = __kvm_device_attr_set(vpmu_vm.vcpu->fd, KVM_ARM_VCPU_PMU_V3_CTRL,
> +				    KVM_ARM_VCPU_PMU_V3_FILTER, &invalid);
> +	TEST_ASSERT(ret && errno == EINVAL, "Set Invalid filter action "
> +		    "ret = %d, errno = %d (expected ret = -1, errno = EINVAL)",
> +		    ret, errno);
> +
> +	destroy_vpmu_vm();
> +}
> +
>  static bool kvm_pmu_support_events(void)
>  {
>  	create_vpmu_vm(guest_get_pmceid);
> @@ -284,4 +320,6 @@ int main(void)
>  	TEST_REQUIRE(kvm_pmu_support_events());
>  
>  	run_tests();
> +
> +	test_invalid_filter();
>  }
Besides Reviewed-by: Eric Auger <eric.auger@...hat.com>

Eric